Detailed text transcripts for TV channel - KGO - 20141218:10:56:00
♪ hit me baby one more time >> reporter: standing at just 5'4', the pint-sized superstar and 33-year-old mother of two says she works hard for these killer results. "i started noticing changes in my body. my hips are a little bit wider because i've had kids so it was crucial for me to be continuous with my exercise." what's her secret? spears, seen in this behind the scenes footage, likes to work up a sweat by attending group fitness classes and yoga. and get this, she doesn't have a personal training saying, i don't mind working out. trainers keep you motivated, but i didn't have a problem ...